I’m going to key off the “guilty” part for a second. The clearest description of cheating I ever heard was “changing the rules without telling the other players.” I’m sure it would be educational and exciting to have a mentor if you were single, or if you and your partner had an agreement.
I think the first thing any good mentor would do is make sure you were in integrity with your partner.
I’m not saying that to be mean or judgmental – fantasies are awesome! But an authentic real-life mentor would keep his pants in, and yours, and help you stay oriented towards your partner.